Harry lehr



(No Model.)-

Y H. LEER.

MANUFAGTURE'OI FINGER RINGS.v i No.545.,597. Patented sept. s, 41895.

i s 1 ,D7

UZ' 7 ff j Isl ' ring-blank as cut out.

i UNITED STATES PATENT GFFICEE.

HARRY LEHR, oF NEW, YORK', N. Y., AssIeNoR CFOELHALF To THEMEER-BCTTMANUFACTURINC COMPANY, or SAME PLACE.

MANUFACTURE oF FINGER-RINGS.

SPECIFICATION forming part of Letters-Patent No. 545,597, datedseptember s, 1895. Application fina December 17,1894. serai Natsaoz's.(No man.)

To all wiz/0m, it may concern:

Be it known that I, HARRY LEHR, a citizen of the United States, residingin the city, county, and State of New York, have invented an Improvementin the Manufacture of Finger-Rings, of which the following is aspecification.

My invention relates to the manufacture of seamless finger-rings fromsheetmetal blanks. Finger-rings have heretofore been formed from flatrings of sheet metal by a series of operations with dies that spread theinner edge of the ring-blank and contractthe outer edge of said blank.

In my improvement an imperforate blank is by suitable dies struck upinto cup shape. The bottom is then by other. dies cut out of the cup,leavingv a cylindrical ring-blank.

This ring-blank isthen put upon a mandrelv and shaped between saidmandrel and dies with recessed surfaces, so as to obtain the desiredsectional form of the finished ring.

In the drawings I have represented by diagrammatic sections thesuccessive stages in the operations of cutting out and shaping therings, Figures l, 2, and 3 being sections of the dies that are used insuccession. Fig. 4 is a section of the cup. Fig. 5 is a section of thesWaging-dies and of the mandrel upon which the ring is placed during thesw'aging operation. Fig. 6 is a section of the cylindrical Fig. 7 is aside view. Fig. Sis a section of the form used in making the dies. Fig.9 is one side of the separable die. Fig. 10 is a vertical section of thefinishing-rolls, and Fig. ll is a vertical section at right angles tothe sectional plane of Fig. l0.

The die A is circular and of a size adapted to the ring to be made, andthe punch B tits the die A and is adapted to cut out a circularimperforate blank D from the sheet orV strip of gold or similar metal C,and this circular blank D is 'struck up by the punch E and die F intothe cup-shaped blank D', (shown sectionally in Fig. 4,) and the bottomof this cupshaped blank is cut out by a -punch G and die H, (shown inFig. 3,) whereby the cylindrical seamless ring-blank D2 is produced thatis finished up to form thenger-ring. I provide a recessed die K, adaptedto be secured to the bed of any suitable stamping-press, and a similardie L, that is adapted to be secured to the head-block or follower ofsuch press, so that this die L can be raised and brought down with thedesired force in swaging the ring D2 upon the mandrel M, and therecesses 2 and 3 in the respective dies K and L are rounding and nearly'segments of a globe, and in preparing these dies K and L it isadvantageous to provide a steel blank N, that is turned up to correspondto the exterior rounding surface of the finger-ring that is to beproduced, and this form N is hardened and polished, and then it isintroduced into a suitable drop-press or stamp, and the die K, in a softcondition, is roughly recessed, and the form N is forced down upon suchdie and into such recesses togive shape to the same and produce apolished surface on the interior of such recesses adapted to act uponthe lingerring. This die K is then hardened, andthe die L is similarlyprepared, so that the recesses 2 and 3 in the respective dies correspondand are very smooth and adapted to inishing the exterior surfaces of thering D2. The form N is advantageously dressed off at one side, so as toform a flat surface against which the follower presses when using thisform for giving shape to the recesses 2 and 3 in the manufacturev of thedies K and L, and the other portions of the form N, being circular,correspond to the recesses 2 and 3, and this form can be used betweenthe dies K and L when such dies are being placed in the drop or press,so that after the die L has been secured in the follower or'head ,thedie K can be adjusted, so that the form N acts properly between the twodies and in the respective recesses, and then the die K is to be heldfirmly in position by screws or otherwise, as usual. The mandrel M istapering, so as to be adapted to different sizes of finger-rings, andthe blank D2 iszslipped upon the same, so that the ring can be laid intothezrecess 2 in the die K, and then the die L 4is to be brought down bythe action of the drop or press to swage the finger-ring D2 and roundits edges, and these operations are repeated while the mandrel M isrotated until the ring is shaped complete upon this' mandrel M by theaction of the dies K and L. During this operation the gold is hardenedand consolidated, and, if desiredjthe dies can be manipulated so as tostretch the ring D2 to the desired size, the mandrel M being moved alonginto the ring as it is enlarged by the swagingoperation; but usually thering will not be enlarged, because the dies K and L extend over itsufficiently to act in contracting the ring instead of stretching it, ifso desired.

Itsometimes happens that the finger-ring requires to be enlarged and itsedges nished smoothly. To accomplish this object, I make use of rollersP Q, supported in suitable frames or holders RS, which are movable onetoward the other, so that by placing the ring over the roller Q and thenbringing the same up against the roller P and rotating such roller Q bya, crank or handle T the ring will be rolled between the two surfacesand receive a smoothing operation at its edges, and by these rolls thering can be reduced in thickness and increased in diameter to whateverextent is desired.

Fin ger-rings, especially those that are plain, are made of variousWidths, and to accommodate such varying. widths the dies K and L aremade in two parts separable in a plane passing through the centers ofthe recesses 2 and 3, and when these two parts of the dies K and L areput together and secu red by bolts 7 and 8 such dies are adapted to thenarrowi est width of ring, and plate-sections 9 and 10 can be introducedbetween the sectional dies K L so, as to increase the kwidth of therecesses 2 and 3 to any desired extent, according to the thickness ofthe plates 9 and 10, and such l plates are heldin position by the boltsand their smooth edges or operative surfaces are to be flush and truewith the curved surfaces of the respective recesses 2 and 3.

I claim as my inventionl. The herein described improvementin themanufacture of finger rings consisting in cutting out a circularimperforate blank, stamping the same up into a cup shape, cutting outthe bottom of the cup and thereby forminga cylindrical ring blank, andswaging such ring blank between a mandrel and dies with recessedsurfaces to give the blank the required sectional shape, substantiallyas set forth.

2. The herein described improvement in the manufacture of finger ringsconsisting in cutting out a circular imperforate blank, stamping thesame up into a cup shape, cutting out the bottom of the cup and therebyforminga cylindrical ring blank, and swaging such ring blank between amandrel and dies with recessed surfaces to give the blank the requiredsectional shape, and also rolling the ring between rollers to nish thesurfaces of the edges, substantially as set forth.

3. In the manufacture of finger rings the dies K and L having plainrecessed surfaces and divided into two parts centrally andlongitudinally through such recessed surfaces, and removable platesintroduced between the two parts of the dies and having plain edgesconforming to the curved recessed surfaces of the dies and which platesare changeable for similar plates of different thicknesses, and boltsfor securing the dies and plates together so as to adapt such dies tofinger rings of different widths, substantially as set forth.

Signed by me this 14th day of December` 1894.

HARRY LEUR.

Witnesses:

GEO. P. PINCKNEY, S. T. HAVILAND.

